This is the unofficial subreddit for T-Mobile ISP/Home Internet service.
5g modem that allows imei SIM card spoofing
GLiNet Spitz AX 5G (I’ve done this on mine) and likely the Puli AX
https://www.gl-inet.com/products/gl-x3000/
Difference between the two is Puli has built in battery
Spitz is great
Had one for over six months, hands down the best overall cellular router on the market.
This is not a search engine.
stfu, unhelpful
Chestertech
These are just suncomm, buy suncomm instead.
Quectel RM521f, Quectel RM520n, Fibocom FM160, Fibocom FM170. Those are modems that you can change the imei with a simple AT Command. You can build your own setup with them or buy something preassembled with them already installed into a router.
I see the Suncomm routers on Aliexpress, but none that either come the x65 or no wwan card. What would you recommend? Also the only x65 source on Aliexpress I can find is sold out.
Most third-party gateways on the market now allow this or offer the ability to do it yourself by giving you access to the AT command interface in some manner. Just make sure whatever you do look into getting is compatible with T-Mobile and its bands.